How does water get filtered while passing through sand, charcoal, etc.?

Question

How does water get filtered while passing through sand, charcoal, etc.?

In: 3473

Answer 1

The water flows through the filter, whereas the particles that were in the water, are larger than the tiny spaces/gaps that’re in the filter, so they don’t pass through and flare trapped in the filter.

Imagine if I had a sieve full of flour, but I drop some rice in there too. As I shake the sieve, all the flour will pass through the sieve but the rice won’t, because the grains are too big to go through the holes in the sieve.